I just finished the final season yesterday and this would be my second time watching the incomplete series. Despite the reviews, I thought there was going to be a season 4. That is why I watched it so much.
I very much enjoyed the series, I thought it was really dark and non-merciful. Much series that I watch with a horror label does not REALLY go for it, but Salem did. To me horror is not all about the scaring. Salem accomplished a different type of Horror, which was shocking and disgustingly provocative. I am very sadden to find out there will be no season 4. I feel like it was deserving of it.
I do not rate it 10/10 because the series is incomplete. I know making money is important, but I wish you guys just completed your story. Now many others and I are left disappointed, with the cliffhanger.
p.s. Finish what you start, no matter what!